private void _repeat_times(NakoNodeRepeatTimes node)
{
int labelId = GetLableId();
// (0)
NakoILCode label_for_begin = createLABEL("TIMES_BEGIN" + labelId.ToString());
NakoILCode label_for_end = createLABEL("TIMES_END" + labelId.ToString());
// (1) 変数を初期化する
result.Add(label_for_begin);
addNewILCode(NakoILType.LD_CONST_INT, 1L);
addNewILCode(NakoILType.ST_LOCAL, node.loopVarNo);
// 何回実行するか回数を評価する
Write_r(node.nodeTimes);
addNewILCode(NakoILType.ST_LOCAL, node.timesVarNo);
// (2) 条件をコードにする
// i <= iTo
NakoILCode label_for_cond = createLABEL("TIMES_COND" + labelId.ToString());
result.Add(label_for_cond);
// L
addNewILCode(NakoILType.LD_LOCAL, node.loopVarNo);
// R
addNewILCode(NakoILType.LD_LOCAL, node.timesVarNo);
// LT_EQ
addNewILCode(NakoILType.LT_EQ);
// IF BRANCH FALSE
addNewILCode(NakoILType.BRANCH_FALSE, label_for_end);
// (3) 繰り返し文を実行する
_loop_check_break_continue(node.nodeBlocks, label_for_end, label_for_begin);
Write_r(node.nodeBlocks);
// (4) 変数を加算する (ここ最適化できそう)
addNewILCode(NakoILType.INC_LOCAL, node.loopVarNo);
// (5) 手順2に戻る
result.Add(createJUMP(label_for_cond));
result.Add(label_for_end);
}
//> _repeat_times : _value REPEAT_TIMES _scope_or_statement
//> ;
private bool _repeat_times()
{
TokenTry();
if (!_value()) return false;
if (!Accept(NakoTokenType.REPEAT_TIMES))
{
TokenBack();
return false;
}
TokenFinally();
tok.MoveNext(); // skip REPEAT_TIMES
NakoNodeRepeatTimes repnode = new NakoNodeRepeatTimes();
repnode.nodeTimes = calcStack.Pop();
repnode.nodeBlocks = _scope_or_statement();
repnode.loopVarNo = localVar.CreateVarNameless();
repnode.timesVarNo = localVar.CreateVarNameless();
this.parentNode.AddChild(repnode);
lastNode = repnode;
return true;
}